Investments in Unconsolidated Affiliates (Tables)

12 Months Ended

Dec. 31, 2021

Investments In Unconsolidated Affiliates [Line Items]

Investments in Equity Method Unconsolidated Affiliates

The following table presents Duke Energy’s investments in unconsolidated affiliates accounted for under the equity method, as well as the respective equity in earnings, by segment, for periods presented in this filing.

	Years Ended December 31,
	2021				2020				2019
			Equity in				Equity in		Equity in
			earnings				earnings		earnings
(in millions)	Investments		(losses)		Investments		(losses)		(losses)
Electric Utilities and Infrastructure	$	104	$	7	$	105	$	(1)	$	9
Gas Utilities and Infrastructure	231		8		215		(2,017)		114
Commercial Renewables	513		(34)		534		—		(4)
Other	122		47		107		13		43
Total	$	970	$	28	$	961	$	(2,005)	$	162

ACP

Investments In Unconsolidated Affiliates [Line Items]

Investments in Equity Method Unconsolidated Affiliates

For the year ended December 31, 2020, Duke Energy's investment in ACP met the requirements of S-X Rule 4-08(g) to provide summarized financial information. The following table provides summary information for ACP as required under S-X Rule 1-02(bb) for the period of significance and comparative prior year periods in Duke Energy's consolidated balance sheets and consolidated statements of operations. For the year ended December 31, 2021, there were no investments that met the significance requirements.

(in millions)			December 31, 2020
Current assets			$	43
Noncurrent assets			93
Current liabilities			1,965
Noncurrent liabilities			167
Membership interests			(1,996)
	Years Ended December 31,
	2020		2019
Net revenues	$	—	$	—
Operating loss	(4,612)		(5)
Net (loss) income	(4,512)		246
Net (loss) income attributable to Duke Energy	$	(2,121)	$	116